.up {
    position: fixed;
    right: 30px;
    bottom: 30px;

    width: 40px;
    height: 40px;

    cursor: pointer;

    border: none;
    border-radius: 10px;
    background: var(--primary);
    box-shadow: 0 4px 4px rgb(0 0 0 / 5%);
}

.up:hover {
    background-color: var(--primary-hover);
}